EP0357929A2 - Procédé et dispositif de dosage d'accélérateurs de prise pour l'application de béton projeté - Google Patents

Procédé et dispositif de dosage d'accélérateurs de prise pour l'application de béton projeté Download PDF

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Publication number
EP0357929A2
EP0357929A2 EP89113728A EP89113728A EP0357929A2 EP 0357929 A2 EP0357929 A2 EP 0357929A2 EP 89113728 A EP89113728 A EP 89113728A EP 89113728 A EP89113728 A EP 89113728A EP 0357929 A2 EP0357929 A2 EP 0357929A2
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EP
European Patent Office
Prior art keywords
accelerator
water
amount
relative
relative amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP89113728A
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German (de)
English (en)
Other versions
EP0357929A3 (fr
Inventor
Georg Braun
Otto Gindl
Hans Goertz
Oskar Schauritsch
Guenther Strappler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TRICOSAL GmbH
Original Assignee
TRICOSAL GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TRICOSAL GmbH filed Critical TRICOSAL GmbH
Publication of EP0357929A2 publication Critical patent/EP0357929A2/fr
Publication of EP0357929A3 publication Critical patent/EP0357929A3/fr
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/06—Inhibiting the setting, e.g. mortars of the deferred action type containing water in breakable containers ; Inhibiting the action of active ingredients
    • C04B40/0641—Mechanical separation of ingredients, e.g. accelerator in breakable microcapsules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/0404—Proportioning
    • B28C7/0413—Proportioning two or more flows in predetermined ratio
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00034—Physico-chemical characteristics of the mixtures
    • C04B2111/00146—Sprayable or pumpable mixtures

Definitions

  • the invention relates to a method for the continuous or continuous mixing and discharge of shotcrete, whereby according to the invention to achieve a simple or precise handling a relative, for example with additives such as sand, gravel or the like a relative amount of water, which determines a degree of wetness or the saturation of the shotcrete, and is mixed with a relative amount of accelerator, based on the relative amount of cement, as the target value of a liquid solidification accelerator to give shotcrete.
  • the invention further relates to a device for performing the method.
  • the production of shotcrete usually serves to provide a liquid concrete mixture that solidifies in a very short time from the time of the addition of the chemical solidification accelerator, namely, for example, in less than a minute and in good time before the start or End of this solidification has already reached the surface of the building to be concreted. Therefore, the liquid concrete mix is produced in one pass and, immediately after mixing under pressure, is discharged as a jet from a spray nozzle, which can be a direct component of a mixing head and is guided, for example, by hand and directed against the building surface. In this respect, discharge takes place immediately after the production of the liquid concrete from the dry concrete mixture or after the solidification accelerator has been added.
  • alkaline earth accelerators especially aluminate accelerators
  • aluminate accelerators are used in a proportion of around 5% based on the amount of cement, so that, for example, about 15 l of liquid or dry solidification accelerators are used for 380 kg of cement per cubic meter of concrete.
  • silicate or water glass accelerators can also be used, however, a share of about 15-20% is generally required here.
  • the shotcrete is preferably processed in the dry spraying method, in which the dry concrete mixture is only mixed with water and solidification accelerator almost immediately before it is discharged, the latter being added to the water before it is added to the concrete mixture.
  • the shotcrete can also be processed in the so-called wet spraying process, in which a mixture of cement, aggregate, possibly also additive and water is first produced, which is then conveyed essentially air-free in a dense stream to a discharge head and in its area by feeding is converted from conveying air to a thin stream, the solidification accelerator being mixed with the conveying air or in the region of the discharge head.
  • the discharge or head can be changed relatively easily by changing the water supply, whereas in the case of the wet spraying process, such a control is not possible.
  • the possibility of a continuous change in the degree of wetness of the shotcrete is particularly desirable in order to be able to meet different requirements, for example the position of a building surface in relation to a gravitational axis, climatic conditions, surface structure of the building surface and the like.
  • a lower degree of wetness than in the case of an upright or floor-side building surface is desirable in order to counteract the detachment or outflow of the liquid concrete mixture prior to solidification.
  • Overdosing the solidification accelerator also has significant disadvantages not only because the solidification accelerator is relatively expensive, but also because, if the dosage is too high, for example in the case of alkaline earth accelerators, a dosage above 10% also leads to a delay the concrete solidification can lead.
  • Undesired changes in the proportion of the solidification accelerator can result, for example, from pressure fluctuations in the water supply for the shotcrete mixture and temperature-related changes in viscosity of the solidification accelerator, due to changes in the conveying speed or the conveying pressure of the solidification accelerator, or as a result of feedback effects being caused, for example, by changes in the setting of the water supply to the discharge head.
  • Construction sites are usually equipped with a self-contained water and air supply for numerous consumers of the construction site, so that switching on and off such consumers constantly results in pressure changes that can lead to faults in the exact metering of the solidification accelerator.
  • the invention is also based on the object of creating a method or a device of the type mentioned, by means of which disadvantages of known solutions are avoided and with which, in particular, the setting rate of the shotcrete can be set to a desired actual value in a simple manner. Possibly. the solidification rate should be able to be adapted to the respective requirements without necessarily having to decrease or increase correspondingly sharply with the reduction in the degree of wetness.
  • an actual value of the supplied relative amount of accelerator is continuously measured, compared with the target value and then readjusted to the latter.
  • the relative amount of accelerator within a control tolerance relative to the relative amount of cement or the relative dry mix can be kept constant in a narrow range or essentially over the entire processing time, the relative amount of accelerator fluctuating continuously within the control tolerance around the desired value.
  • the control tolerance is expediently at most ⁇ 0.5%, that is, for example, in the case of a target value of 5% between 4.5 and 5.5% and thus fluctuates by 10%, based on the accelerator itself.
  • a control tolerance of less than 0.3%, preferably at most about 0.2%, is preferably used.
  • the method according to the invention can be used both in the wet spray and in the dry spray process.
  • the relative amount of accelerator before admixing to the amount of cement or to the dry mix is admixed in the course of the relative amount of water and then the relative mix amount of water and solidification accelerator thus formed is expediently in a discharge mixing head with the dry mix supplied dry by compressed air also in one pass mixed.
  • the solidification accelerator is expediently conveyed with a higher delivery pressure than this, with a differential pressure of 1.5-2 bar being preferred will. To adjust this differential pressure, it is advisable not to change the delivery pressure of the solidification accelerator, but the other delivery pressure.
  • the proportion of the solidification accelerator can be changed or increased by correspondingly setting the setpoint manually.
  • the relative amount of accelerator is expediently kept substantially constant with respect to the relative amount of cement within the control tolerance, so that the mixing ratio between water and solidification accelerator is changed only when the relative amount of water changes.
  • the rela tive amount of cement promoted essentially constant and only the relative amount of water and within the control tolerance, the relative amount of accelerator, based on the relative amount of cement changed.
  • a measurement signal of the accelerator flow rate is advantageously passed directly to a controller, which generates an actuating signal depending on the target / actual value deviation, and thus affects the flow rate via a control valve.
  • the relative amount of accelerator can be kept constant with a closed control loop, for example acting on a throttle or control valve.
  • the absolute amount of accelerator flowing through in particular by adding up the amount of accelerator flowing through per unit of time, is measured and the quantity value is stored, since then an exact control of the consumption of solidification accelerator is always made possible and this amount is compared with the amount of cement processed can.
  • the relative amounts mentioned, in particular of the solidification accelerator are expediently recorded as volumes, but can also be determined as masses.
  • the relative amount of accelerator can be changed at least in relation to the relative amount of water and in opposite directions.
  • the relative amount of accelerator based on the amount of cement, should expediently be changed between zero and substantially less than the relative amount of water compared to the relative amount of dry. If the amount of drying supplied per unit of time is not normally increased, this could result in an approximately proportional increase in the amount of accelerator supplied per unit of time, and conversely, if the amount of drying supplied is reduced, a corresponding reduction in the amount of accelerator mean.
  • the desired amount of solidification accelerator can be added to the amount of drying, irrespective of the amount of water added that, for example, if the degree of wetness of the liquid concrete mixture is reduced, the setting time can be kept at least approximately constant or even shortened compared to the higher degree of wetness.
  • a major advantage of the invention is that the solidification accelerator can always be metered in an optimum relative amount in a controlled manner and therefore does not generally have to be overdosed for safety reasons, which brings considerable cost savings in view of the high production costs for the solidification accelerator.
  • This can be achieved in particular if, in a method in which the degree of wetness of the shotcrete is changed over a predetermined wet degree range between a maximum value and a minimum value, the relative amount of accelerator compared to the relative amount of water over essentially this entire wet degree range in both directions of the change in the wet degree range is changed almost continuously continuously in opposite directions, so that a seamless or instantaneous adjustment of the accelerator concentration of the relative amount of water with its change is guaranteed.
  • liquid solidification accelerators for example, about 200 l, up to a maximum of 250 l of water within a quantity tolerance of ⁇ 3% and 15 l of liquid solidification accelerators are mixed into the dry concrete mixture, which for example consists of about 300 kg of cement as well as sand and gravel and a volume of corresponds to about 785 l.
  • the proportion of the liquid solidification accelerator, in relation to the cement weight in the concrete, is of the order of 5%. If a relatively low degree of wetness of the shotcrete is required, the proportion of water is reduced to about half in this example, but the accelerator concentration in the water is increased at least twice, whereby this degree of wetness can represent the lowest value of the wet degree range, during its highest value is achieved with the double amount of water mentioned.
  • the relative amount of accelerator is disproportionately reduced compared to the relative mixed amount of water and solidification accelerator when this mixed amount is reduced.
  • the procedure can advantageously be such that the relative amount of accelerator can be kept at least approximately constant compared to the relative amount of drying, and can preferably be increased when the relative amount of water decreases.
  • a signal for metering the solidification accelerator is sent from Mixing head above the mixing quantity discharged per unit of time upstream of the mixing quantity flowing between the mixing head and the metering of the solidification accelerator, for example, by reducing the flow of the mixing quantity from the mixing head, which leads to a corresponding reduction in the total mixing quantity flowing per unit of time and therefore can be derived as a signal for the metering of the solidification accelerator.
  • the control of the flow rate can be formed, for example, in each case by a valve which, in the case of two wet level stages provided, can be coupled in two operating positions.
  • the amount of accelerator can be adjusted very precisely, in particular if the amount of water is changed continuously.
  • the detection can be carried out on the flowing, still unmixed water before the solidification accelerator is metered in.
  • An advantageous development of the invention can, however, consist in the fact that the change in the mixing amount of water and liquid, in particular aqueous, solidification accelerator resulting from the change in the relative amount of water is detected and then the opposite change in the relative amount of accelerator is determined. As a result, it is always possible to determine very precisely the amount of liquid actually supplied to the dry mixture and thus the effective degree of wetness, and if necessary to influence it.
  • the liquid solidification accelerator can bring about relatively large viscosity fluctuations, which is why the change in the mixing quantity is expediently measured independently of viscosity, preferably with an electromagnetic field measurement, in order to achieve a measurement accuracy which is essentially not affected by this.
  • the amount of the solidification accelerator is metered in the form of volume amounts, since relatively simple devices are sufficient for this and nevertheless a very high metering accuracy can be achieved.
  • a device for discharging and continuously mixing shotcrete which has a water supply and a dry supply to achieve a concrete mixture and is provided with a feed device for a solidification accelerator.
  • This device is for achieving the object mentioned according to the invention, characterized in that a metering device is provided for the supply of the solidification accelerator, which is influenced in particular by a control or regulating device for the relative change in the amount of accelerator opposite to the change in the amount of water such that the accelerator concentration of the amount of water is changed according to a certain dosing ratio to the amount of water flowing through per unit of time.
  • the water supply is formed by a water line reaching almost to the mixing head and the dry supply is formed by a corresponding dry line for the concrete mixture, the feed device for the solidification accelerator being connected to the water line, which preferably has an adjustable throttle for changing the flow of water is assigned.
  • the control device is influenced by a device that detects the change in a flow rate, in particular essentially the water flow rate.
  • the control device can be designed to change the relative amount of accelerator fully automatically as a function of the change in the amount of water.
  • the solidification accelerator can also be fed directly to the mixing head or at least shortly before it, a particularly robust design results if the metering device has a feed for the solidification accelerator in the water pipe, the feed being expediently in the flow direction at a distance in front of the mixing head, namely expediently is provided in the region of the end of the flexible liquid hose facing away from this.
  • a measuring element of the measuring device can also be provided at a corresponding distance from the mixing head or from the shotcrete nozzle and arranged so that it is in the flow direction behind the feed for the solidification accelerator and thus possibly also designed to measure the change in the mixed amount of water and solidification accelerator can be, but is preferably arranged directly adjacent to the feed for the solidification accelerator or in the area of the metering device.
  • the measuring element of the measuring device is designed in a preferred embodiment as a measuring element that is independent of viscosity, and expediently has no moving mechanical parts, but is arranged in a substantially mechanically fixed manner with respect to the measuring point and is preferably formed by a measuring element for electromagnetic field measurement.
  • a measuring element for electromagnetic field measurement In comparison to a measurement that is also conceivable, for example by means of a Venturi tube, this results in a measurement arrangement that is very insusceptible to faults, the measuring element being in the region of a full width, i.e. can be arranged compared to the other line sections not narrowed line section.
  • At least one control device is advantageously used Lockable actuation, in particular arranged in a housing which preferably accommodates essentially the entire regulating and / or control device.
  • a compressed air conveying device can be provided for the dry amount on the one hand or a compressed air conveying device for the solidification accelerator instead or in addition thereto, both conveying devices being expediently supplied by a common pressure source or via a common compressed air line. If the available network pressure of the water pipe is too low, for example below 3 bar, a feed pump can be arranged in this liquid pipe, preferably in the direction of flow before the solidification accelerator is supplied, so that the solidification accelerator is metered into the water in an area in which this flows with precisely controlled pressure or precisely predetermined flow rate.
  • a system for substantially continuous discharge and continuous production of shotcrete which has at least one water line originating from a pressure source and at least one dry line originating from a pressure source and intended for at least one concrete mixture, these lines leading to a discharge opening having mixing head are connected and the system is provided with a feed device for feeding a solidification accelerator into the water and in the water pipe with an adjustable throttle, which serves to arbitrarily change the amount of water flowing through.
  • the water line is connected to a metering device for the solidification accelerator, the one control device for a z. B. has opposite relative change in the amount of accelerator.
  • the drying line is expediently connected to a mobile conveying device for the concrete mixture, for example an at least two-axis motor vehicle, which can follow the mixing head or spray nozzle in accordance with the construction progress and is connected to the mixing head or spray nozzle essentially exclusively by flexible hose lines.
  • a mobile conveying device for the concrete mixture for example an at least two-axis motor vehicle, which can follow the mixing head or spray nozzle in accordance with the construction progress and is connected to the mixing head or spray nozzle essentially exclusively by flexible hose lines.
  • the training according to the invention is particularly suitable for the production of shotcrete for tunnel construction.
  • the metering device can be arranged with the control device on the conveyor so that they are always accessible on the conveyor, for example for maintenance.
  • the design according to the invention is expediently provided such that, if necessary, a shotcrete layer applied up to at least 20 cm thick solidifies or hardens sufficiently within a maximum of 50 seconds, in particular about 40 seconds.
  • the system 1 according to the drawing according to the drawing is used for the targeted continuous metering of a liquid chemical solidification accelerator in shotcrete, such that at the spray nozzle the added concrete contains the required amount of accelerator in a very specific ratio, although the viscosity of the liquid shotcrete accelerator changes continuously for various reasons can and also the simultaneous addition of water depending on the required concrete quality is continuously changed by the operator operating the shotcrete nozzle.
  • a targeted dosage based on the cement portion of the admixed concrete, is achieved fully automatically.
  • the device 2 has the portable spray nozzle 4, which is to be guided by the operator by hand and directed against the building surface to be concreted, which is part of a mixing head 3 which is expediently axially aligned at its rear end, so that the mixing of the dry mixture with water and solidification accelerator is practical only takes place in the spray nozzle in such a way that the sprayed concrete mixed in a continuous flow emerges under pressure from the front nozzle opening as a jet.
  • the mixing head 3 or the spray nozzle is provided with at least one valve for changing or shutting off the inflowing water.
  • the valve for the water supply which is designed in the manner of a continuously adjustable throttle 5, is continuously adjustable with a handle 6 between a closed position and its most open position.
  • the mixing head 3 is connected to a drying line 7, which in particular has the same axis and adjoins its rear end, for the supply of the concrete mixture, and to a water line 8, which adjoins it radially, for the water supply.
  • the water pipe 8 and / or the dry pipe 7 can for example be 8 to 10 m long and are expediently formed by flexible hoses.
  • the dry line 7 serves for the supply of premixed dry concrete
  • the water line 8 serves for the supply of a mixture of water and liquid solidification accelerator, expediently generally being carried out in such a way that the throughput quantity of concrete mixture or the quantity of cement contained therein per unit of time is kept constant, just as this applies approximately to the flow rate of the solidification accelerator, but not to the flow rate of the water, which is continuously changed with the help of the hand lever 6 by the operator carrying the spray nozzle 4 as required.
  • the drier the concrete is set by the operator with the help of valve 5, the sooner the solidification accelerator is driven with a slight overdosing. So essentially only the amount of water is changed during operation. Automatic control is used for the amount of accelerator.
  • a mobile conveying device 9 is provided for supplying the dry concrete mixture, to which the end of the drying line 7 remote from the mixing head 3 is connected.
  • a metering device 10 is provided for the supply of the water enriched with the solidification accelerator, to the outlet of which the end of the water pipe 8 which is remote from the mixing head 3 is connected.
  • the metering device 10 has at least three inputs, näm Lich at least one for a water supply line 11, at least one for an accelerator supply line 13 and at least one for a compressed air supply line 15.
  • a feed pump 12 which is expediently located directly adjacent to the metering device 10 can be switched into the water supply line 11 in order to achieve a precisely determinable delivery pressure.
  • the accelerator supply line 13 is connected on the input side to a storage container 14 in the form of a large-volume pressure storage tank which cannot be refilled during operation and from which the metering device 10 is supplied with the solidification accelerator.
  • the storage container 14 can be, for example, a pressure-tight tank with a capacity of several cubic meters, with which air pressure of approximately 6 bar is expediently applied.
  • the storage container is kept permanently at approx. 6 bar with compressed air so that the differential pressure necessary for feeding into the water is given.
  • the reservoir 14 is expediently designed as a horizontal tank with footrests, for example runners.
  • the compressed air supply line 15 is connected via a branch line 16 on the one hand to the storage container of the metering device 10 and on the other hand via a branch line 17 to the conveying device 9 in such a way that the concrete mixture supplied to the dry line 7 with a compressed air flow through the dry line 7 to the mixing head 3 promoted and discharged with this or under the pressure of this compressed air flow as a jet from the spray nozzle 4.
  • the dry spraying machine 9 has a hopper 19 which is open at the top and over which the discharge end of a conveyor 20, for example a belt conveyor rers lies. With the conveyor 20, the dry concrete mixture is conveyed into the hopper 19 of the spraying machine from a refillable intermediate storage or a storage silo 21, from which compressed air is blown and conveyed further via a rotating rotor into the inlet of the drying line 7.
  • a feed point 22 is provided in the metering device 10, in which the water from the supply line 11 and the solidification accelerator from the supply line 13 are brought together and mixed homogeneously with one another.
  • a control or regulating valve 23 for example arranged in the supply line 13 is arranged for the solidification accelerator, which can be, for example, a valve which can be actuated by an electromagnetic drive 31 and which is controlled by a regulating device 24 of the metering device or its controller 32 receives its control signals via a signal line 30.
  • These control signals are dependent on the measurement results of a measuring device 25, on the basis of whose measurement results the control device 24 operates or which is connected to the controller 32 via a control line 27.
  • a measuring device 25 is provided in the flow direction upstream of the supply point 22 on the supply line 13 in the metering device 10 and operates in the manner of a magnetic or electrical field measurement regardless of viscosity, so that vane wheel meters or similar mechanically operating measuring devices can be dispensed with.
  • a pressure regulator 35 for the water pressure, in particular in the flow direction upstream of the feed point 22, can be provided, with a pressure gauge expediently between the feed point 22 and the pressure regulator 35 29, in particular with an optical display device 36 for determining the delivery pressure in the supply line 11.
  • the measuring device 25 expediently also influences a counting device 34 or a counter which is suitable for detecting the total flow rate of solidification accelerator as a totalizer.
  • the spray nozzle 4 is kept aligned, the valve 5 is opened and dry concrete mixture is conveyed under air pressure in a constant amount per unit of time.
  • the amount of liquid supplied is controlled. If the amount of liquid supplied is reduced by corresponding actuation of the handle 6, the amount of solidification accelerator supplied to this unit of quantity of the water supplied is increased in accordance with the necessary ratio of solidification accelerator / cement, with an increase of the accelerator concentration slightly disproportionate to the reduction in the flow rate through the water line 8 can be provided in the water, for example in that the control is also derived from the total flow rate in the water line 8.
  • the relative proportion of accelerator is generally kept constant in relation to the relative proportion of cement in the concrete mixture.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
EP19890113728 1988-09-08 1989-07-25 Procédé et dispositif de dosage d'accélérateurs de prise pour l'application de béton projeté Withdrawn EP0357929A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883830479 DE3830479A1 (de) 1988-09-08 1988-09-08 Verfahren und vorrichtung zum dosieren von fluessigen erstarrungsbeschleunigern zum austragen von spritzbeton
DE3830479 1988-09-08

Publications (2)

Publication Number Publication Date
EP0357929A2 true EP0357929A2 (fr) 1990-03-14
EP0357929A3 EP0357929A3 (fr) 1991-04-10

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EP19890113728 Withdrawn EP0357929A3 (fr) 1988-09-08 1989-07-25 Procédé et dispositif de dosage d'accélérateurs de prise pour l'application de béton projeté

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EP (1) EP0357929A3 (fr)
DE (1) DE3830479A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779135A1 (fr) * 1995-12-14 1997-06-18 Aliva Aktiengesellschaft Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions
EP1710064A3 (fr) * 2005-04-06 2007-10-31 Sto Ag Procédé et dispositif de traitement des materiaux de construction
WO2011061176A3 (fr) * 2009-11-18 2011-10-13 Christian Cebular Appareil de mélange d'enduit et procédé de formation variable d'enduit
EP2465835A1 (fr) * 2010-12-17 2012-06-20 BASF Construction Polymers GmbH Procédé de fabrication continue de masses de mortier
WO2012143617A1 (fr) * 2011-04-20 2012-10-26 Upm-Kymmene Corporation Procédé et appareil permettant d'ajouter un additif à une composition de type ciment

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2724648B1 (fr) * 1994-09-20 1997-09-05 Sandoz Sa Controle de l'hydratation de systemes a base de ciment
DE19626312A1 (de) * 1996-07-01 1998-01-08 Wilhelm Haase Anlage und Verfahren zur Baustellenedelputzeinfärbung
DE19838710C2 (de) * 1998-08-26 2002-03-21 Spritzbeton Stuttgart Gmbh & C Verfahren zur Herstellung spritzfertigen Spritzbetons
DE202012101942U1 (de) 2012-05-25 2013-05-27 Sanitär Fliesen Natursteine Volk GmbH Vorrichtung zum Anmachen von Gemischen mit Sand-, Zement- und flüssigen chemischen Additiven, insbesondere von Estrich

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DE2443797B2 (de) * 1974-09-13 1977-03-24 Bergwerksverband Gmbh, 4300 Essen Verfahren und einrichtung zum regeln der zuteilmenge an anregerfluessigkeit in anhydrit-foerderleitungen
EP0009660A1 (fr) * 1978-09-22 1980-04-16 Intradym Maschinen Ag Procédé et dispositif pour la projection de béton
EP0206224A2 (fr) * 1985-06-28 1986-12-30 Friedrich Wilh. Schwing GmbH Dispositif pour l'application de matériaux de construction durcissables, transportés hydromécaniquement dans un courant à haute viscosité, en particulier d'un béton ou mortier hydraulique projeté

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
DE2417012A1 (de) * 1974-04-08 1975-10-23 Scheurich Verfahren und vorrichtung zur herstellung einer betonmischung gebildet von zementzuschlagstoffen, wasser und zusatzmitteln
DE2443797B2 (de) * 1974-09-13 1977-03-24 Bergwerksverband Gmbh, 4300 Essen Verfahren und einrichtung zum regeln der zuteilmenge an anregerfluessigkeit in anhydrit-foerderleitungen
EP0009660A1 (fr) * 1978-09-22 1980-04-16 Intradym Maschinen Ag Procédé et dispositif pour la projection de béton
EP0206224A2 (fr) * 1985-06-28 1986-12-30 Friedrich Wilh. Schwing GmbH Dispositif pour l'application de matériaux de construction durcissables, transportés hydromécaniquement dans un courant à haute viscosité, en particulier d'un béton ou mortier hydraulique projeté

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779135A1 (fr) * 1995-12-14 1997-06-18 Aliva Aktiengesellschaft Procédé de réglage de la quantité de projetée d'un mélange de matériaux de construction pulvérisable et installation de pulvérisation pour constructions
EP1710064A3 (fr) * 2005-04-06 2007-10-31 Sto Ag Procédé et dispositif de traitement des materiaux de construction
WO2011061176A3 (fr) * 2009-11-18 2011-10-13 Christian Cebular Appareil de mélange d'enduit et procédé de formation variable d'enduit
EP2465835A1 (fr) * 2010-12-17 2012-06-20 BASF Construction Polymers GmbH Procédé de fabrication continue de masses de mortier
WO2012143617A1 (fr) * 2011-04-20 2012-10-26 Upm-Kymmene Corporation Procédé et appareil permettant d'ajouter un additif à une composition de type ciment

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EP0357929A3 (fr) 1991-04-10
DE3830479A1 (de) 1990-03-15

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